Lubricating apparatus



`Iune 11, 1929.

H. J. MURPHY LUBRI CATINYG APPARATUS Original Filed March 14. `1922 fil Patented June 11, 1929.

UNITED STATES VP .arreui oFF-lcs.

HOWARD J.

MURPHY, OF READING, MASSACHU/S'ETTS, ASSIGNORpBY MESNE ASSIGN- CORPORATION OF DELAWARE 'LUBBIGATING APPARATUS.

Original application tiled March 14,1922, Serial No. 543,646. Divided and tliis application led .Tune 20,`

. 1928. Serial No. 286,986.

This invention pertainsto improvements in lubricating apparatus, and more particularly to lubricating apparatus of the type in which the lubricant is delivered under pressure to the part/to be lubricated. It is among vthe objects ot' the invention to provide to lubricant expelling device of superior convenience in operation. y v

Referring to the drawing, the single figure is aside elevation of a preferred form of my invention, being partly in section.

Referring to the drawing, showing a'preferred form of my invention selected for illustrative purposes, I have shown a lubricant expelling device including a cylinder 4 from which lubricant may be expelled by a piston 5 which may be solely actuated by the spring 6 or by a combination of the" spring 6 with a thrust exerted on the tubular stem 7. As the piston 5 is moved toward the left, as viewed in the drawing, pressure is exerted on .the lubricantwithin the cylinder 4 tending to expel it from -the nozzle V8 of the expelling device. The preferred form ot' nozzle illustrated includes a coupling of the type illustrated-in co-pending application, Serial No. 543,643, tiled March 14, 1922, now Patent No. 1,661,904, issued March 6, 1928, adapted to engage the lubricant receiving nipple 9 of the type illustrated in said co-pending application. The nozzle may include the sealing disc 1() and rotary valve mechanism 11, 12 similar to that illustrated in the co-pending application above referred to.

In the preferred form of my invention illustrated, a charging device 13 is' provided for loading the lubricant expelling device, this charging device preferably being rovided with a nozzle 14 including a va ved coupling similar to that herein previously described and adapted to engage over a. lubricant receiving nipple 15 preferably similar to the lubricant receiving nipple 9 but mounted'at the end of the tubular stem 7. The charging means preferably takes the form of a second lubricant expelling device very considerably larger than the lubricant expelling device first described. This charging device may be used either to force lubricant into the lubricant expelling device having the cylinder 4, through the hollow stem 7 thereof, or :tor coupling direct to nipples on the more accessible part. to be lubricated,

the smaller lubricant expelling device being reserved, 'if desired, for use on the more inaccessible nipples, While the second lubricant expelling device may include a barrel 16 having a piston reeiprocable therein (not shown) and a sci ewthrcaded stem 18 adapted to press against the piston in grease expelling direction.

My invention is particularly adapted for use as a unitary apparatus for supplying lubricant to nipples under both high and extreme- ',ly high pressure. In so using-my invention charging device 13 will not pass into the bearing but will till'the cylinder 4, pushing the' therein, or to the right as piston 5 rearwardly thereby compressing the shown in the ligure,

.spring 6. When the cylinder 4 is' full of lubricant, the operator presses the handle 19 of the charging device 13 toward the nipple' 9 attached to the bearing to be lubricated, thereby increasing the pressure-on the lubricant in the barrel 4 and forcing this lubricant into the bearing at materially increased pressure. In this connectionit should be noted that any thrust exerted on the piston 5 through the tubular. stem 7 is in addition to the force exerted by the spring 6 and serves to increase the pressure in the cylinder 4 over that exerted by the charging device 13 in lilling said cylinder.

This application is a division ot my copending application, Serial No. 543,646, tiled March 14, 1922.

lVhile I have shown and described a prefered form of one embodiment of myl invention. it will be understood that changes involving omissions, substitutions, alterations and reversal of parts, and even changes in the mode ot' operation, may be made without departing from the scope of my invention,

which is best defined in the following claims. I claim: u

. 1. Lubricating apparatus comprising, 1n

Icombination, a portable lubricant expelling device, charging means for said device including a second lubricant expelling device, coupling means for securing said devices together during the charging operation, said first named expelling device including a piston and a hollow piston rod through which lubricant is received from said second named expelling device, high pressure spring means urging said piston in lubricant expelling direction, and a valved coupling at the dis,- charge end of said second expelling device.

2. Lubricating apparatus of the class described comprising, in combination, relatively low pressure compressing means, relatively high pressure compressing means supplied therefrom, resilient means in said high pressure compressing means tending to expel lu`- bricant therefrom, and means whereby manual pressure may be exerted on said low' pressure compressing means to increase the pressure on the lubricant in said high pressure compressing means beyond that exerted by said resilient means.

3. High pressure lubricating apparatus of the class described comprising, in combination, relatively low pressure compressing means, portable, relatively high pressure compressin means supplied therefrom, a quick detac iable discharge coupling for connecting said high pressure compressing means with a bearing to be lubricated, resilient means in said high pressure compressing means, said resilient means tending to force lubricant to said bearing and energized by the filling of said high pressi-e compressing means from said low pressure compressing means, and a handle part whereby a direct manual thrust may be applied to said high pressure compressing means to discharge lubricant therefrom ata pressure greater than that exerted by said low pressure compressing means.

4. Lubricating apparatus of the class described comprising, -in combination, a barrel, a piston therein for discharging lubricant therefrom, a'handle rotatable toadvance said piston, a cylinder having a supply connection with said barrel, a piston in said cylinder, resilient means for operating said piston. in lubricant discharging direction, said resilient means energized by the filling of said cylinder with lubricant, a discharge coupling for said cylinder, and means connecting said cylinder with said barrel whereby a manual thrust exerted on said handle serves to increase the pressure on the lubricant in said cylinder.

5. ln high pressure lubricating apparatus of the class described, the combination of a relatively low pressure cylinder, means for expelling lubricant therefrom, a relatively. high pressure cylinder connected to'said low pressure cylinder and supplied therefrom, expelling means in said high pressure cylinder, means for connecting said high pressure cylinder with a part to be lubricated, a handle for operating both of said expelling means, and resilient means tending to operate one of said expelling means.

6. In lubricating apparatus of the class described, the combination of a relatively` low pressure cylinder, expelling means therefor, al relatively high pressure cylinder communicating with said low pressure cylinder and supplied therefrom, expelling means in said high pressure cylinder, a spring tending to operate said last named expelling means, coupling means for connecting said high pressure cylinder with a part to be lubricated, and a handle operable in one direction to actuate said 10W pressure expelling means and operable ina second direction to actuate said high pressure expelling means. y

7. High pressure lubricating apparatus of the class described comprising, in combination, a relatively low pressure cylinder, expelling means therein, a quick detachable coupler carried by said cylinder, a portable, relatively high pressure cylinder, a spring pressed piston therein, a tubular piston rod detachably engaging said coupler and serv ing as a supply conduit for said high pressure cylinder, a second quick detachable coupler carried by said high pressure cylinder for establishing a connection with a part to be lubricated, and a handle for applying force to said expelling means and said piston.

8. In high pressure lubricating apparatus of the class described, the combination of a relatively low pressure cylinder, a screw operated piston therein, a quick detachable coupler carried by said cylinder, a portable, relatively high pressure cylinder supplied from said low pressure cylinder, a quick detachable coupler carried by said high pressure cylinder forconnccting said cylinder With a part to be lubricated, a piston in said high pressure cylinder, a spring for biasing said piston in one direction, a tubular piston rod for said high pressure piston having a part engageable in said first named coupler, a check valve located in said piston rod for preventing the high pressure created in said high pressure cylinder from being exerted on said low pressure cylinder, and handle means for operating said pistons.

In Witness whereof, I hereunto subscribe my name this 14th day of June, 1928.

HOWARD J. MURPHY. 

